Commit-ID: f0af911a9dec9de702645182c8d269449e24d24b
Gitweb: http://git.kernel.org/tip/f0af911a9dec9de702645182c8d269449e24d24b
Author: Torben Hohn <torbenh@xxxxxx>
AuthorDate: Thu, 27 Jan 2011 15:59:10 +0100
Committer: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
CommitDate: Mon, 31 Jan 2011 14:55:43 +0100
time: Provide xtime_update()
xtime_update() takes xtime_lock write locked and calls
do_timer(). Provided to replace the do_timer() calls in the
architecture code.
Signed-off-by: Torben Hohn <torbenh@xxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: johnstul@xxxxxxxxxx
Cc: yong.zhang0@xxxxxxxxx
Cc: hch@xxxxxxxxxxxxx
LKML-Reference: <20110127145910.23248.21379.stgit@localhost>
Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
---
include/linux/sched.h | 1 +
kernel/time/timekeeping.c | 13 +++++++++++++
2 files changed, 14 insertions(+), 0 deletions(-)
diff --git a/include/linux/sched.h b/include/linux/sched.h
index d747f94..9d9a078 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -2050,6 +2050,7 @@ extern void release_uids(struct user_namespace *ns);
#include <asm/current.h>
extern void do_timer(unsigned long ticks);
+extern void xtime_update(unsigned long ticks);
extern int wake_up_state(struct task_struct *tsk, unsigned int state);
extern int wake_up_process(struct task_struct *tsk);
diff --git a/kernel/time/timekeeping.c b/kernel/time/timekeeping.c
index 8da35d1..02c13a3 100644
--- a/kernel/time/timekeeping.c
+++ b/kernel/time/timekeeping.c
@@ -969,3 +969,16 @@ void get_xtime_and_monotonic_offset(struct timespec *xtim, struct timespec *wtom
*wtom = wall_to_monotonic;
} while (read_seqretry(&xtime_lock, seq));
}
+
+/**
+ * xtime_update() - advances the timekeeping infrastructure
+ * @ticks: number of ticks, that have elapsed since the last call.
+ *
+ * Must be called with interrupts disabled.
+ */
+void xtime_update(unsigned long ticks)
+{
+ write_seqlock(&xtime_lock);
+ do_timer(ticks);
+ write_sequnlock(&xtime_lock);
+}
--
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